visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나

Pseudogap in surface-doped black phosphorus

2021.06.04 16:24

admin 조회 수:1160

장소 Online seminar 
일시 Jun. 11 (Fri.), 04:00 PM 
연사 Dr. Keun Su Kim(Yonsei University) 

 

SRC Seminar

 

 

Pseudogap in surface-doped black phosphorus

 

Dr. Keun Su Kim

Department of Physics, Yonsei University

 

Jun. 11 (Fri.), 04:00 PM

Online seminar

https://kaist.zoom.us/j/89283252628
회의 ID: 892 8325 2628

암호: 916514

 

 

Abstract:

Many of the interesting quantum phenomena arise at the interface between a crystalline insulator and disordered dopants. In this kind of the interface between black phosphorus and alkali metals, we have studied the tunable band gap1, topological phase transition2, and the evolution of quantum phases (or pseudospin)3. After briefly summarizing the past results, I will introduce our recent discovery of a pseudogap in black phosphorus doped by various alkali metals4. With angle-resolved photoemission spectroscopy (ARPES), we reveal an anomalous band dispersion of back-bending and pseudogap, which can be explained by the Anderson-McMillan band dispersion of liquid metals developed in 1960s. This is a natural consequence of resonance scattering by dopant ions with only short-range order (or liquid order). The depth of a scattering potential tuned by different kinds of alkali metal (Na, K, Rb, and Cs) allows us to classify the pseudogap of p-wave and d-wave resonance.

 

References

1.          J. Kim et al., Science 349, 723 (2015)

2.          J. Kim et al., Phys. Rev. Lett. 119, 226801 (2017)

3.          S. W. Jung, S. H, Ryu, W. J. Shen et al., Nature Mater. 19, 277 (2020)

4.          S. H. Ryu, M. Huh, D. Y. Park et al., Nature, accepted (2021)

 

Contact: SunYoung Choi, (sun.0@kaist.ac.kr)

Center for Quantum Coherence in Condensed Matter, KAIST

 

번호 일시 장소 연사 제목
공지 Sep.22 2022  E6-1 #1323    2022 가을학기 응집물리 및 광학 세미나 전체 일정
361 Oct. 25 (Fri), 15:00 ~  #1323, E6-2  Daesu Lee,Junwoo Son,MyungJoon Han ,Siheon Ryee,Eun-Gook Moon  Physics Seminar file
360 Oct. 18 (Tue.), 3PM  E6-2. 1st fl. #1323  Dr. JunHo Suh, Korea Research Institute of Standards and Science  “Hybrid quantum systems with mechanical oscillators”
359 Oct. 18 (Tue.), 1:30 PM  1st fl. #1323(E6-2)  Dr. Chan-Ho Yang, Department of Physics, KAIST  "Visualization of oxygen vacancy in motion and the interplay with electronic conduction"
358 Oct. 17th (Mon) 11:00 AM  #1323,(E6-2, 1st fl.)  Nguyen Quang Liem, Institute of Materials Science, VAST, Viettnam  IMS and examples of the studies on optoelectronic materials
357 Oct. 16 (Fri.), 04:00 PM  https://kaist.zoom.us/j/89198078609  Dr. Daesu Lee  Hidden room-temperature ferroelectricity in CaTiO3 revealed by a metastable octahedral rotation pattern file
356 Oct. 16 (Fri.), 02:30 PM  https://kaist.zoom.us/j/89198078609  Dr. Chulki Kim  Nanoscale magnetic resonance detection towards nano MRI file
355 Oct. 15, 4pm  (https://kaist.zoom.us/j/93997220310)  정현석 교수님 (SNU)  Towards resource-efficient and fault-tolerant quantum computation with nonclassical light
354 Oct. 13 (Thu), 4:00PM  E6-2 #1323  김영진(KAIST 기계공학과 교수)  (광학분야 세미나) Ultrafast Optics for Ultra-Precision Metrology and Realization of Flexible/Stretchable Laser-Induced-Graphene Electronics
353 Oct. 12 (Fri.), 04:00 PM  E6-2. 1st fl. #1323  Dr. HyungWoo Lee  Direct observation of a two-dimensional hole gas at oxide interfaces file
352 Oct. 12 (Fri.), 02:30 PM  E6-2. 1st fl. #1323  Dr. Daniel Kyungdeock Park  Quantum Advantage in Learning Parity with Noise file
351 Oct. 10(Tue) 4PM  E6-2 #1323  김성웅 교수 (성균관대학교 에너지과학과)  Discovery of New 2D Materials with Diverse Physical Properties
350 Oct. 07 (Fri), 4:00 PM  E6-2. #1323(1st fl.)  Dr. Choong Hyun Kim,IBS-CCES, Seoul National University  “Tilt engineering of 4d and 5d transition metal oxides?”
349 Oct. 07 (Fri), 1:30 PM  E6-2. #1323(1st fl.)  Dr. Suk Bum Chung, IBS-CCES , Seoul National University  “Symmetry and topology in transition metal dichalcogenide?”
348 Oct 9 (Fri), 09:00 AM  https://kaist.zoom.us/j/85161896513?pwd=U3pwWFFZaWVRamxDZUR5REhNeVk0UT09  Prof. Tim Hsieh (Perimeter Institute)  Quantum Many-Body Simulation file
347 Oct 23 (Fri.), 14:00 PM  E6-2 #1323  Prof. Ivan Savenko (University of Science and Technology & IBS PCS)  Plasmon spectroscopy of low-dimensional superconductors in fluctuating regime file
346 November 8 (Thu.), 16:00 PM  #1323, E6-2  이종완 박사  Conformality lost file
345 November 7 (Thu.), 16:00 PM  #1323, E6-2  Prof. Je-Hyung Kim  Integrated quantum photonics with solid-state quantum emitters file
344 November 5 (Tue.), 4:00 PM  #1323, E6-2  Dr. Shik Shin  Study on nanomaterials by the development of ultrahigh resolution laser-photoelectron microscopy (PEEM) file
343 November 29 (Thu.), 16:00 PM  #1323, E6-2  Dr. Kee suk Hong  양자 칸델라 실현을 위한 단일 광자 발생장치 개발 file
342 November 28 (Thu.), 16:00 PM  #1323, E6-2  Prof. Kyung Taec Kim  Generation of coherent EUV emissions using ultrashort laser pulses file